LiMn2O4 nanorods as a super-fast cathode material for aqueous rechargeable lithium batteries

LiMn2O4 nanorods were prepared by a facile hydrothermal method in combination with traditional solid-state reactions and characterized by X-ray diffraction analysis. Their electrochemical behavior was tested by cyclic voltammetry and repeated charge/discharge cycling. Results show that the reversible intercalation/deintercalation of Li-ions into/from LiMn2O4 cathode can yield up to 110 mAh/g at 4.5 C, and still retains 88% at the very large charge rate of 90 C with well-defined charge and discharge plateaus. It presents very high power density, up to 14.5 kW/kg, and very excellent cycling behavior, 94% capacity retention after 1200 cycles. It is thus a competitor for LiFePO4.

► We prepared LiMn2O4 nanorods by hydrothermal method in combination with a solid-state reaction. ► Their reversible intercalation/deintercalation of Li ions can be up to 110 mAh/g at 4.5 C. ► It still keeps 88% of capacity at the very large charge rate of 90C with well-defined charge and discharge plateaus. ► It shows very high power density, up to 14.5 kW/kg, and excellent cycling behavior.